#ifndef _STDIO_H_
#define _STDIO_H_

#define CRLF                    "\n\r"

int sprintf(char * buf, const char * fmt , ...);

int printf(const char * fmt , ...);

int sscanf(char * buf, const char * fmt , ...);

int scanf(const char * fmt , ...);

char * itoh(int v, char * b);

char * itoa(int v, char * b);

int isalpha(int c);

int isalnum(int c);

int isdigit(int c);

int islower(int c);

int isupper(int c);

int tolower(int c);

int toupper(int c);

#endif _STDIO_H_ /* end of _STDIO_H_ */
